Analysis for the Load Transfer Behaviors of the Uplift Single Pile with an Integral Equation Method and Parameter Studies

Abstract:

According to the working behavior of tension piles, the loads carried by the pile tip are assumed to be zero. A Fredholm integral equation of the second kind for single tensile pile in elastic half space is deduced based on the fictitious pile model. By solving the nonlinear equations with the least square method, the axial forces, shear forces and displacement along the pile shaft are obtained. Compared with the available literatures, the reasonable of the present method is validated. The main factors, such as the pile stiffness, the length-to-diameter ratio and the Passion’s ratio, are investigated to analyze the load transfer behaviors of the tension pile. The results showed that the pile stiffness and the length-to-diameter ratio have obvious influence on the load transfer characters of the uplift pile. Some valuable conclusions can be drawn for the theoretical analysis and engineering practices.